I know the supposed "intent". I understand it, but disagree with the premise because anecdotes, while disturbing, don't really represent the facts. Not going into that here because I don't have the time. And even if I was wrong I would still have a problem with it for a different reason.
I think this very much is an "America sucks" protest, whether it is meant to be that or not. Those that agree with the protesters, in my opinion are protesting the wrong thing. Those that are against the protesters because of the veterans, first responders, and what have you, in my opinion are missing the bigger picture.
What these guys are really doing, whether they mean to or not, are trampling on our ideals. The ideals of this country are about as perfect as we can possibly put together, all tied to the amazing Declaration of Indepence document. Everything that put this country together flows from that. Our ideals of course have been imperfectly applied because we are imperfect. The US does not have a perfect history. But the ideals themselves are perfect. It's these very ideals that when applied in their proper manner, have allowed us to improve to the extent that we have. The very nature of things like slavery and eventual emancipation and corresponding civil rights movements can all trace their roots back to the simple phrase: "We hold these truths to be self-evident, that all men are created equal...". Everything flows from that. Imperfect practice. Perfect ideal.
When they dishonor the flag and the anthem, they are dishonoring the very ideals that allow them the freedom they enjoy. They may have a case in their greivance; but this action does nothing for them, doesn't suggest an alternative, but simply insults all of those who believe in the ideals. I have a Russell Wilson jersey. I like Russell Wilson. It's the only jersey I've ever owned with someone else's name on it. I won't wear it as long as these things are going on. I'll watch the games, but it's not the thing it used to be. It used to be a place where like-minded fans could forget this stuff and be united. Now it's been soiled. And it's ugly.